Merv Posted 10October, 2019 Report Share Posted 10October, 2019 As the weather heats up dramatically in the north, I have been checking the operation of the front wing-mounted oil cooler. All seems good and flow through the pipes to and from the cooler seems on spec. I can't hear the fan coming on but plan on checking that when I work out how to test the fan at the fuse box. I was also looking at these https://www.ebay.com.au/itm/New-PORSCHE-911-Oil-Cooler-Air-Scoop-fits-S-SC-930-Turbo-1974-89-buy-one-or-two/362699853752?hash=item5472988fb8:g:NfoAAOxy4kpQ9X5S Are they useful and is there an Australian source? Quote Link to comment Share on other sites More sharing options...
ruby82sc Posted 11October, 2019 Report Share Posted 11October, 2019 I use a scoop on my SC and assume it has benefit. There is some opinion around the traps that the fan doesn't do much more than block air flow while driving in most situations. It needs to be a stinkin hot day with you sitting still for the fan to come on which is what it was designed to do. While driving the air flow is sufficient to not heat the engine/oil enough to have the fan engage but it is mounted on the front of the cooler which acts as a barrier to air flow while driving. Quote Link to comment Share on other sites More sharing options...
Peter M Posted 11October, 2019 Report Share Posted 11October, 2019 Merv, I reckon save your money. Logical Reasoning: For a street driven, reasonably standard car the only time they get really hot is in bumper to bumper traffic on a hot day. In those situations the air scoop won't help anyway. Emotional Reasoning: My recollection is your car is far to nice to install something so naff looking. 😊 Quote Link to comment Share on other sites More sharing options...
Merv Posted 11October, 2019 Author Report Share Posted 11October, 2019 Points taken Peter and Ruby. Leave it alone. I would like to test the fan operation however. is there a 'jump' process as the fuse box? Quote Link to comment Share on other sites More sharing options...
ruby82sc Posted 11October, 2019 Report Share Posted 11October, 2019 You would need to bridge or bypass the thermostat and trick it into thinking you are stuck in traffic on a stinken hot day. Quote Link to comment Share on other sites More sharing options...
Philbee Posted 11October, 2019 Report Share Posted 11October, 2019 You could try a melb spare parts place http://www.aporschapart.com/ Quote Link to comment Share on other sites More sharing options...
Merv Posted 11October, 2019 Author Report Share Posted 11October, 2019 1 hour ago, ruby82sc said: You would need to bridge or bypass the thermostat and trick it into thinking you are stuck in traffic on a stinken hot day. My interest is where to do that. On the fuse box? Quote Link to comment Share on other sites More sharing options...
ruby82sc Posted 11October, 2019 Report Share Posted 11October, 2019 I don't know how it has been wired but a basic circuit would be powered from the fuse panel to a relay triggered by the thermostat. If you can follow the wiring back from the fan you should be able to work out what is power, earth and switch then introduce power back to the fan downstream of the relay/switching device. Quote Link to comment Share on other sites More sharing options...
Merv Posted 11October, 2019 Author Report Share Posted 11October, 2019 Thanks. I will look through the overall diagram and see if I can find an input test point. Just thought that someone may have done this before. Quote Link to comment Share on other sites More sharing options...
clutch-monkey Posted 11October, 2019 Report Share Posted 11October, 2019 16 hours ago, ruby82sc said: I use a scoop on my SC and assume it has benefit. There is some opinion around the traps that the fan doesn't do much more than block air flow while driving in most situations. It needs to be a stinkin hot day with you sitting still for the fan to come on which is what it was designed to do. While driving the air flow is sufficient to not heat the engine/oil enough to have the fan engage but it is mounted on the front of the cooler which acts as a barrier to air flow while driving. the fan does not block enough air to be a detriment when driving, and certainly keeps oil temps safe when stuck in traffic. my next mod will be testing a small water nozzle placed on the deck lid to send a mist into the engine fan as an extra buffer for track days Quote Link to comment Share on other sites More sharing options...
Cheshire Cat Posted 11October, 2019 Report Share Posted 11October, 2019 might be useful in this case http://forums.pelicanparts.com/porsche-911-technical-forum/1037933-oil-cooling-test-stock-trombone-vs-mocal-radiator.html Quote Link to comment Share on other sites More sharing options...
Merv Posted 12October, 2019 Author Report Share Posted 12October, 2019 Interesting thread! Overall however the use of the air scoop seems to have negligible effect on the tests performed by the OP. The use of a clean 'trombone' oil line seems to help more. My fan does work. I found on the circuit diagram that a black wire in the right front of the trunk area was the direct feed and with an external 12V source, it spins up well. That is good news. However, the next test is to see if the thermostat triggers it and if so at what dC it does this. The 'stat does open as I can feel the pipes are hot when the temp gauge is on, or close to, the second white mark. I haven't pushed it beyond there yet. Summer is coming! Quote Link to comment Share on other sites More sharing options...
autojack Posted 12October, 2019 Report Share Posted 12October, 2019 22 hours ago, Merv said: Points taken Peter and Ruby. Leave it alone. I would like to test the fan operation however. is there a 'jump' process as the fuse box? I knew I remembered seeing an old thread about this. See second comment. http://forums.pelicanparts.com/porsche-911-technical-forum/313264-oil-cooler-fan-tstat-switch-installation.html Quote Link to comment Share on other sites More sharing options...
Merv Posted 12October, 2019 Author Report Share Posted 12October, 2019 Thanks for this. I had seen it but could not find it again. Three things are useful in that thread: 1) using a lower temp thermostat switch 2) doing that without removing the front bumper and 3) fitting a manual over ride switch that can turn on the fan by grounding the relay. All very useful! Quote Link to comment Share on other sites More sharing options...
autojack Posted 12October, 2019 Report Share Posted 12October, 2019 When I got my 911 I started soaking up information from Pelican like a sponge. I bookmarked a lot of things, other stuff is just in my head. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.